<template>
	<el-container class="home-container">
		<!-- 头部区域 -->
		<el-header>
			<div>
				<img src="../assets/newyear.png" alt="" />
				<span>电商后台管理系统</span>
			</div>
			<el-button type="info" @click="logout">退出</el-button>
		</el-header>
		<!-- 页面主体区 -->
		<el-container>
			<!-- 侧边栏 -->
			<el-aside :width="isCollapse ? '64px' : '200px'">
				<div class="toggle-button" @click="toggleCollapse">|||</div>
				<!-- 侧边栏菜单区 -->
				<el-menu
					background-color="#333744"
					text-color="#fff"
					active-text-color="#409EFF"
					unique-opened
					:collapse="isCollapse"
					:collapse-transition="false"
					router
					:default-active="activePath"
				>
					<!-- 一级菜单 -->
					<el-submenu
						:index="item.id + ''"
						v-for="item in menulist"
						:key="item.id"
					>
						<!-- 一级菜单的模板区 -->
						<template slot="title">
							<!-- 图标 -->
							<i :class="iconsObj[item.id]"></i>
							<!-- 文本 -->
							<span>{{ item.authName }}</span>
						</template>

						<!-- 二级菜单 -->
						<el-menu-item
							:index="'/' + subItem.path"
							v-for="subItem in item.children"
							:key="subItem.id"
							@click="saveNavState('/' + subItem.path)"
						>
							<template slot="title">
								<!-- 图标 -->
								<i class="el-icon-menu"></i>
								<!-- 文本 -->
								<span>{{ subItem.authName }}</span>
							</template>
						</el-menu-item>
					</el-submenu>
				</el-menu>
			</el-aside>
			<!-- 右侧内容主体 -->
			<el-main>
				<!-- 路由占位符 -->
				<router-view></router-view>
			</el-main>
		</el-container>
	</el-container>
</template>

<script>
export default {
	data() {
		return {
			// 左侧菜单数据
			menulist: [],
			iconsObj: {
				125: 'iconfont icon-user',
				103: 'iconfont icon-tijikongjian',
				101: 'iconfont icon-shangpin',
				102: 'iconfont icon-danju',
				145: 'iconfont icon-baobiao',
			},
			// 是否折叠
			isCollapse: false,
			// 被激活的链接地址
			activePath: '',
		};
	},
	created() {
		this.getMenuList();
		this.activePath = window.sessionStorage.getItem('activePath');
	},
	methods: {
		logout() {
			window.sessionStorage.clear();
			this.$router.push('/login');
		},
		// 获取所有的菜单
		async getMenuList() {
			const { data: res } = await this.$http.get('menus');
			if (res.meta.status !== 200)
				return this.$message.error(res.meta.msg);
			this.menulist = res.data;
			console.log(res);
		},
		// 点击按钮, 切换菜单折叠与展开
		toggleCollapse() {
			this.isCollapse = !this.isCollapse;
		},
		// 保存链接的激活状态
		saveNavState(activePath) {
			window.sessionStorage.setItem('activePath', activePath);
			this.activePath = activePath;
		},
	},
};
</script>

<style lang="scss" scoped>
.home-container {
	height: 100%;
	.el-header {
		background-color: #373d41;
		display: flex;
		justify-content: space-between;
		padding-left: 0;
		align-items: center;
		color: #fff;
		font-size: 20px;
		div {
			display: flex;
			align-items: center;
			span {
				margin: 15px;
			}
		}
	}
	.el-container {
		.el-aside {
			background-color: #333744;
			.toggle-button {
				background-color: #4a5064;
				font-size: 10px;
				line-height: 24px;
				color: #fff;
				text-align: center;
				letter-spacing: 0.2em;
				cursor: pointer;
			}
			.el-menu {
				border-right: none;
				.el-submenu {
					.iconfont {
						margin-right: 10px;
					}
				}
			}
		}
		.el-main {
			background-color: #eaedf1;
		}
	}
}
</style>
